Writing-machine.



I PATENTED JULY 30, 1907. B. B.'HESS.

WRITING MACHINE. APPLIO ATION FILED APR.221.1907.

4 SHEETS-SHEgT 1.

i wan! di m V 0 14 mdJa/o No. 861,978. PATENTED JULY 30, 1907.

. E. B. HESS.

' WRITING MACHINE.

APPLICATION FILED APR. 22. 1907.

4 SHEETS-SHEET 2.

No. 861,978. PATENTED JULY 30, 1907. E. B. HESS.

WRITING MACHINE.

APPLICATION FILED APR-22, 1907.

4 sums-sum a.

UNITED STATES PATENT OFFICE.

EDWARD B. HESS, OF NEW YORK, N. Y., ASSIGNOR TO ROYAL TYIEWRITER COMPANY, OF

HOBOKEN, NEW JERSEY, A CORPORATION OF NEW JERSEY.

WRITING-MACHINE To all whom it may concern:v

Be it known that I, EnwAI'm B. Hnss, a citizen 0 the United States of America, residing in the borough of Brooklyn, city and State of New York, have invented certain Improvements in Writing-Machines, of which the following is a specification,

This invention relates to a novel arrangement of paper feed devices and an alining or scale-bar in a front strike writing machine.

out of engagement with the platen; Fig. 9, a detail elevation showing the gear connection by which the rear feed roll shaft is positively driven from the platen; Fig. 10, a section on the line 10, 10, of Fig. 3, pmitting the paper table and pan; Fig. 11, a plan vie similar to Fig. 3 showing a modification; and Fig. 12, a section similar to Fig. 5 but on line l2'of Fig. 11.

a, a are the carriage side plates in which is mounted to turn shaft 1) of the usual platen 0. Below the platen is located a frame curved to conform to the contour of the platen and shown composed of three plates one d at each side or end ofithe frame and one d intermediate the ends of the frame. These plates may have the general configuration shown in Fig. 10 and may be united by a tie rod d To their rear upwardly extending parts is secured a section e of the downwardly extending table. In the upper edges of the plates d, d immediately in front of the table section e are formed open bearings for the shaft f or the rear bearings for the reception of shaft g of the front feed roll 9 shown in Fig. 3 as having two sections and in Fig. 11 four sections. In-the interval between the,

'- bearings for the front and rear feed roll shafts there is ends of shaft f fit between downwardly extending jaws i, i at the ends of flat links if extending rearwardly and Specification of LettersPatent.-

Application filed April 22, 1907. Serial No- 369,4-92.

pressure rollers still in engagement with the platen;. Fig. 8, a like view showing the pressure rolls thrown Patented July 30, 1907.

pivoted at i to the side plates of the carriage. These swinging links act primarily as guides for the pressure roll frame which is drawn upwardly toward the platen to-bring the rolls in contact therewith by two coiled springs'l applied one at each end of the frame and each extending from a forward projection j on a cross shaft j to a projecting stud k on the outer face of plate d. Beneath this frame is a rock shaft m to the end of which outside of the right hand side plate a of the carriage is applied a lever arm m; and secured to the shaft near each of its ends is a radial arm n extending upwardly and rearwardly to such position as when carried downward it will engage the stud k. i i

The hub of the lever arm mfhas two flat faces against which a flat platespring m bears to hold the parts in normal position or in position with the pressure rolls drawn away from the platen. By movement of the lever arm m rearwardly, the projections 'm. may be caused to strike the lugs k and depress the roll and pan frame in which position it will be held by the spring m The normal position is. shown in Fig. 6, and in' Fig. 8, the rolls are retractedfrom the platen.

When the pan and front and rear feed rolls are drawn downwardly by the raidal arms at, theyall descend vertically, orsubstantially so and the extent of move ment of the rear feed roll, pan and front feed roll'away from the surface of the platen is uniform, or substan; tially so. That is to say the frame comprising the front and rear feedlrolls and interposed pan descends bodily so that the clearance between the front and rearfeed rolls and the surface of the platen is the same, or substantially so. .The action is quite different from what would occur if the frame were pivoted in rear of the rear feed roll and rocked about such pivot in its movement away from the platen. The behavior of applicants-de- Vices affords more perfect control of the paper in the machine-particularly when a plurality of sheets are being used. The pressure roll frame may properly be described as a floating frame, or-as one loosely supported, whose behavior is quite unlike what it would be if it rocked about a fixed axis. It has the capability of adapting or adjusting itself to the platen so as to maintain proper engagement of both the front and rear rolls therewith even though one of them may have become flattened, or worn, or the platen may have lost its exact circular contour. The general arrangement described is rendered more eflicient, it is believed, when the rear feed roll is positively driven from the platen at the same surface speed as the latter.

' This invention therefore further provides that in-an organization of this kind, the roar roll shaft shall be positively driven from the platen at the same surface speed as that of the platen. This may be readily accomplished by a gear 0 at one end of the platen moshing withasmallcr gear 10 on the end of the roll shaft f. The

platen and transversely to the axis thereof and a paper pan extending between the several plates said frame being adapted to move bodily downwardly away from the platen, front and rear pressure rolls below the axis of the platen whose shafts are mounted in hearings in said plates, spring devices for normally urging the frame upwardly to bring the rolls into engagement with the platen, means for depressing the frame to carry the rolls out of engagement with the platenfand guide links pivoted to the carriage frame and having hearings in which lies the shaft of the rear feed roll.

11. In a visible writing machine, a platen, front and rear feed rolls mountedrespectively in front and rear of a vertical line passing through the axis of the platen a paper pan intermediate the front and rear feed rolls and means for simultaneously moving the rolls downwardly to carry them substantially equal distances away from their normal points of engagement wit the surface of the platen.

ii. In a visible writing machine, a. platen front and rear feed rolls mounted respectively in front and rear of a vertical line passing through the axis of the platen, a paper pan intermediate the front and rear feed rolls, means for simultaneously moving the rolls downwardly to carry them substantially equal distances away from their normal points of engagement with the surface of the platen, and means for positively driving the rear feed roll at the same surface speed as'that of the platen,

13. In a visible writing machine, a platen, front and rear feed rolls arranged below the horizontal plane passing through the axis of the platen and respectively in frqnt and rear of a vertical plane passing through said axis, means for simultaneously moving both rolls downwardly, in substantially vertical lines, out of engagement with the surface of the platen and means for positively driving the rear feed roll at the same surface speed as that of the platen. i

l-l. In a visible writing machine, a platen, a frame comprising a paper pan located beneath the platen and conforming generally to the contour thereof and a paper table section extendim, upwardly and rearwardly away from the platen. front pressure rolls mounted in said frame in front of the paper pan and a rear pressure roll mounted in said frame between the paperpan and section of paper table, spring acting means acting upon the frame to hold the rolls in engagement with the face of the platen and means for depressing the frame bodily in a substantially vertical direction to carry the rollers out of engagement withthe platen. w

1-5. In a visible writing machine, a platen, a frame comprising a paper pan located beneath the platen and conforming generally to the contour thereof and a papertable section extending upwardly and rearwardly away from the plate 1, front pressure rolls mounted in said frame in front of the paper pan and a rear pressure roll mounted in said frame between the paper pan and section of'paper table, spring acting means acting upon the frame to hold the rolls in engagement wiLh the face of the platen, means for depressing the frame bodily in a substantially vertical directiou to carry the rollers out of engagement with the platen. and means for positively driving the rear roll from the platen at the same surface speed as that of the latter.

1G. in a visible writingmachine, a platen, front and rear feed rolls normally engaging the face of the platen, a

scale bar normally located below the line of print, means acting (luring the early stage of its movement to raise the scale bar to the line of print and during the final stage of movement to move the front and rear feed rolls out of engagement with the face of the platen.

17. A visible writing machine comprising. a platen a paper receiving pressure roll. a paper delivery pressure roll, and a spring supported floating or loosely mounted frame in whiclrthe rolls are carried adapted to adjust itself to the platen to maintain uniform contact of both rolls therewith.

18. A front strike writing machine comprising a platen, front and rear pressure rolls lying below a horizontal plane passing through the axis of the platen, and a spring supported floating or loosely mounted frame in which the rolls are carried adapted to adjust itself to the platen to maintain uniform contact of both rolls therewith.

19. A front strike writing machine comprising a platen, front and rear pressure rolls lying below a. horizontal plane passing through the axis of the platen, a paper pan between the two rolls and a spring supported floating or loosely mounted framecarrying the rolls and pan and adapted to adjust itself to the platen to maintain uniform contact of both rolls therewith.

20. A front strike writing machine comprising a platen, front and rear pressure rolls and a spring supported axis that is movable up and down relatively to the platen. 21. A front strike writing machine comprising a platen, front and rear-pressure rolls and a spring supported frame carrying the rolls and adapted to move about a spring supported axis that is movable up and down.

22. A visible writing machine comprising a platen, front and real; pressure rolls, a. frame carrying the rolls and links'pivoted at their rear ends to the frame of the platen carriage and pivotally connected at their free front ends with the pressure roll frame. 23. A visible writing machine comprising a platen, front and rear pressure rolls, a frame carrying the rolls and adapted to move about a spring supported axis that is movable up and down and means for positively driving the rear pressure roll from, and at the same surface speed as,

the platen.

a paper receiving or rear pressure roll and a frame carrying the roll and adapted to move about a spring supported axis that is movable up and down and located in rear of the platen.

25. A visible writing machine, comprising a platen, a. paper receiving or rear pressure roll, a frame carrying the roll and adapted to move about a spring supported axis that is movable up and down and means for positively driving the pressure roll from, and at the same surface speed as, the plates.

26. A front strike writing machine, comprising a platen and paper feed devices cooperating therewith and movable about a spring supported axis that is movable up and down and located in rear of the platen.

27. A visible writing machine,'comprising a platen, paper feed devices cooperating therewith and movable about a spring supported axis that is movable up and down and means for moving and locking the feed devices out of operative relation to the platen.

28. A visible writing machine, comprising a platen, paper feed devices cooperating therewith, and a fioating oi; loosely mounted spring supported frame carrying the feed devices.

In testimony whereof, I have hereunto subscribed my name.

EDWARD B. HESS.

L. F. Bnownmo.

frame carrying the rolls and adapted to move about an 24. A front strike writing machine, comprising a platen, 

